OK, let's work through this together. We're starting with 330 and we're going to multiply it by 33, which means we add 330 to itself 33 times.
Step 1: 0 + 330 = 330
Step 2: 330 + 330 = 660
Step 3: 660 + 330 = 990
Step 4: 990 + 330 = 1320
Step 5: 1320 + 330 = 1650
Step 6: 1650 + 330 = 1980
Step 7: 1980 + 330 = 2310
Step 8: 2310 + 330 = 2640
Step 9: 2640 + 330 = 2970
Step 10: 2970 + 330 = 3300
Step 11: 3300 + 330 = 3630
Step 12: 3630 + 330 = 3960
Step 13: 3960 + 330 = 4290
Step 14: 4290 + 330 = 4620
Step 15: 4620 + 330 = 4950
Step 16: 4950 + 330 = 5280
Step 17: 5280 + 330 = 5610
Step 18: 5610 + 330 = 5940
Step 19: 5940 + 330 = 6270
Step 20: 6270 + 330 = 6600
Step 21: 6600 + 330 = 6930
Step 22: 6930 + 330 = 7260
Step 23: 7260 + 330 = 7590
Step 24: 7590 + 330 = 7920
Step 25: 7920 + 330 = 8250
Step 26: 8250 + 330 = 8580
Step 27: 8580 + 330 = 8910
Step 28: 8910 + 330 = 9240
Step 29: 9240 + 330 = 9570
Step 30: 9570 + 330 = 9900
Step 31: 9900 + 330 = 10230
Step 32: 10230 + 330 = 10560
Step 33: 10560 + 330 = 10890

So, 330*33 = 10890